I have an RM55 bubba and 35-01 and want to change straps. I have purchased 2 different 4-prong screw drivers and neither works. The 2.75mm is too big to even fit inside the screw hole. The 2.75mm fits barely but it seems the gaps of the slots may not be wide enough to engage the screw prongs. No matter how I try it just wont engage. Are there any inputs anyone can offer or a screwdriver that they recommend?